Self-Structuration of Three-Wave Dissipative Solitons in CW-Pumped Optical Cavities

  • C. Montes
  • A. Picozzi
  • M. Haelterman
Conference paper
Part of the Centre de Physique des Houches book series (LHWINTER, volume 12)

Abstract

Generation of ultra-short optical pulses in cw-pumped ring cavities are mostly associated to mode locking in active media, as doped fibers or solid-state (e.g. Ti-Sa) lasers. The cavity contains not only a gain element (atoms or ions) but also a nonlinear element of the host medium, such as self-phase modulation (SPM) or intensity dependent absorption. Spontaneous generation of a pulse train in cw-pumped optical fiber cavities without gain elements can been also obtained through modulation instability caused by the combined action of SPM and group-velocity dispersion (GVD) on the CW optical beam [1]. Our aim here is to present another mechanism for pulse generation in a ring cavity due to the three-wave counterstreaming interaction. In this case, nanosecond pulses are spontaneously generated in a cw-pump Brillouin-fiber-ring laser [2]. We show that the same three-wave counterstreaming interaction responsible of symbiotic solitary wave morphogenesis in the Brillouin-fiber-ring laser [3] may act for picosecond pulse generation in a quadratic optical cavity (optical parametric oscillator) [4]. The resonant condition is automatically satisfied in stimulated Brillouin backscattering (SBS) when the fiber-ring laser contains a large number of longitudinal modes beneath the gain curve, since the cw-pump selects among them the resonant acoustic wave (of wavelength near the half of the pump- or Stokes- wavelength). However, in order to achieve quasi-phase matching between the three optical waves in the x (2) medium a grating of sub-μm period is required. Recent experiments of backward second-harmonic generation in periodically-poled LiNbO3 [5, 6] avoids this technical difficulty by using higher-order gratings.

Keywords

Soliton Coupler 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • C. Montes
    • 1
  • A. Picozzi
    • 2
  • M. Haelterman
    • 2
  1. 1.Laboratoire de Physique de la Matière Condensée, Centre National de la Recherche ScientifiqueUniversité de Nice — Sophia AntipolisNice Cedex 2France
  2. 2.Service d’Optique et d’AcoustiqueUniversité Libre de BruxellesBruxellesBelgique

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